Jackscrew



there is provided a jack screw which may.

the crank. The ennd'of this'shaft'l is also "rectangularly shaped-'nudadapted to be 'shown in Fig. 2 the axle member 8 is bifury)cated at 8andl pivotally connected thereto isa universal joint member 13 to whichis pivotally. connected another universal joint member ltby means of apin l5 and this member 14 is provided with a rectangularly shaped recessadapted to receive the shaft 9 thus providing for moving the end of theshaft at the crank in varying positions to avoid obstacles that might bein the way.

'llhough'l` have shown and described a particular ccuistruction,ycombination and arrangement of'parts and portions and certainmodificationsthereof l do not wish to be limited to this particularconstruction, combination and arrangement, nor to the modified formthereof but desire to include in the purview of my invention theconstruction, combination and arrangement substantially as set 'forth inthe appended claims.

t is obvious that with this construction be readily positioned in underand out of the way places by 'the operator grasping the crank 12 andhand rip member 11 and thus supporting the jac screw place it in theposition desired. After which, by holding the hand member 11 in one handfor supporting the jack screw and turning the crank 12 the article to beraised may be readily raised and that it will stand in any positionleft; that the jack screw may be readily removed by turning the crank inthe opposite direction until the screw member 2b is released of the loadand the jack screw removed; that the members 9, 10 andy 12 may bequickly separated and the Whole i ,essere lplaced in compact form forcarrying; that the bearings for supporting the bevel gear 6, provide aball bearing for supportingr the screw which will facilitate theoperation of the jack screw.

Having thus described invention what I claim as new and desire to secureby Letters Patent is:

l. A jack screw, including a base member provided with an integralsideways and upwardly extended side arm journal portions extending fromone sidethereo abevel gear with its lower face downwardly, supported onsaid basev member and threaded internally, a screw memberadapted toscrew into said thread in sind bevel gear, a bevel gear intermeshingwith said first mentioned bevel gear journaled infsaid side arm on saidbase and means for revolving said bevel gear. v

2. A jack screw, including abase member -provided with an extendedjournal arm, a

bevel gear with its lower face downwardly, supported on said base memberthreaded internally, a Screw member adapted t0 screw into said thread insaid bevel gear, a bevel ear intermeshing'with said first mentioned evelgear journaled in said journal arm on said base, means for revolvingsaid bevel gear and ball bearing means between said bevel gear and theupper end of said base member adapted to facilitate its revolutionrelatively to said base member, and a lug secured to the lower endI ofsaid screw mem- 'bei-.reciprocably mounted in a notch in said Jona M.LYDICK,

